Danfoss AK-CH 650 Service Guide

10 Service Guide RC8BV402 © Danfoss 2016-02 AK-CH 650 Version 2.0x
Condenser fan status
Measurements AK error When “ON”, the controller is in alarm condition.
Comp. Ctrl. temp. Actual temperature for compressor control
S4 Cold brine supply Actual cold brine supply temperature measured with S4 temp. sensor
S3 Cold brine return Actual cold brine return temperature measured with S3 temp. sensor
P0 °C Suction pressure in °C. (Measured with the pressure transmitter)
Comp. ctrl. Ref. °C Actual reference temperature for compressor control
Compressor cap. % Cut-in compressor capacity in % (of total capacity)
Request Comp. Cap % Reference for compressor capacity (deviations may be due to time delays)
Cond. ctrl. temp °C Actual temperature for control sensor (Pc or S7)
S7 warm brine °C Actual warm brine temperature for S7 media sensor
(Only used if S7 sensor is selected as regulation sensor)
Pc °C Condensing pressure in °C. (measured with the pressure transmitter)
Cond. ctrl. ref. °C Actual reference temp. for condenser capacity
(incl. external reference signal, if any)
Cond. cap. % Cut-in condenser capacity in % (of total capacity)
Request Cond. cap % Reference for condenser capacity
Fan1/VSD status Status of the Fan 1
ON: Fan is running
OFF: Fan is not running
Fan2.... status As above for fan 2 to 8
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
Fan 1 runtime Total on time for fan 1
Fan 2.... runtime Total on time for fan 2 to 8
Safety Functions
Measurements AK error When “ON”, the controller is in alarm condition.
Comp. Ctrl. temp. Actual temperature for compressor control
S4 Cold brine supply Actual cold brine supply temperature measured with S4 temp. sensor
S3 Cold brine return Actual cold brine return temperature measured with S3 temp. sensor
P0 °C Suction pressure in °C. (Measured with the pressure transmitter)
Comp. ctrl. Ref. °C Actual reference temperature for compressor control
Compressor cap. % Cut-in compressor capacity in % (of total capacity)
Request Comp. Cap % Reference for compressor capacity (deviations may be due to time delays)
Cond. ctrl. temp °C Actual temperature for control sensor (Pc or S7)
S7 warm brine °C Actual warm brine temperature for S7 media sensor
(Only used if S7 sensor is selected as regulation sensor)
Pc °C Condensing pressure in °C. (measured with the pressure transmitter)
Cond. ctrl. ref. °C Actual reference temp. for condenser capacity
(incl. external reference signal, if any)
Cond. cap. % Cut-in condenser capacity in % (of total capacity)
Request Cond. cap % Reference for condenser capacity
Ss suction gas °C Suction gas temperature in °C
Suction superheat K Superheat in suction line
Sd discharge gas °C Discharge gas temperature in °C
Anti freeze safety Actual status of general shared frost protection input for all compressors
Settings Main switch Main switch: ON: Regulation
OFF: Controller stopped
Pc max. limit °C Max. value of discharge pressure in °C
(If the value is exceeded, the entire compressor capacity will be cut out)
(At 3 K under PcA max. the entire condenser capacity will be cut in and
the compressor capacity will be reduced)
Sd max. limit °C Max. value of discharge pressure in °C
(If the value is exceeded, the entire compressor capacity will be cut out and the entire
condenser capacity will be cut in)
P0 min. limit °C Min. value of suction pressure in °C
(If the value becomes less, the entire compressor capacity will be cut out)
P0 min del at start On start of the rst compressor the security switch on the low-pressure security
function ”Po My limit” is delayed by the set time to prevent low-pressure dropout at
start.

Danfoss AK-CH 650 Specifications

General

Brand	Danfoss
Model	AK-CH 650
Category	Controller
Language	English